1. UNIT 7 NUCLEAR REACTIONS 7
UNIT 7 NUCLEAR REACTIONS 7.5 What is Nuclear Fission, Nuclear Fusion and common uses of Nuclear Reactions?
April 20, 2010
AIM: What are fission and fusion and what are the common uses of nuclear reactions?
DO NOW:
QUIZ (5 minutes) A

2. TYPES OF NUCLEAR REACTIONS
DECAY MODE β- β α γ
FISSION
FUSION
NEUTRON CAPTURE
ARTIFICIAL

3. Nuclear Fission
Heavy
slow

4. EXAMPLE
235
U +
n  91
Kr +
142
Ba + n 3
292 1
236 56 1

5. Nuclear Fusion
different
isotopes

6. EXAMPLE 2
H + 2
H  4 He
energy 1 1 2

7. How do Fission and Fusion reactions produce energy?
What powers the sun? 1
H +  4 4
He + e 2
+ energy 1 2 1

8. ~0
4 x ( )=
amu
amu
No, they are not equal

9. Where does energy come from?
This “missing” mass is called the Mass of defect and it is the amount of mass that was converted to energy.
The energy comes from conversion of HYDROGEN to HELIUM

10. EVERYDAY USES OF RADIOISOTOPES
Complete the reading and fill the chart

11. INDEPENDENT PRACTICE Complete the PRACTICE section
Please complete the classwork